Some of the best podcasts start with someone who is not gaming the system, but someone who is simply doing stuff and then turns it into a successful show. However, it can be challenging to determine who is good at podcasting due to the large number of people who want to do it.
Discovering a niche and gaming the system may not be the only way to start a successful podcast; many podcasters succeed by just doing stuff and then creating content around it. While it's difficult to determine who will be great at podcasting, I Heart Media does a good job of finding those who are.